# isgreater

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< c‎ | numeric‎ | math

Defined in header ``<math.h>`` |  |
#define isgreater(x, y) /* implementation defined */ |  | (since C99)

Determines if the floating-point number x is greater than the floating-point number (y), without setting floating-point exceptions.

### Parameters

x | - | floating-point value
y | - | floating-point value

### Return value

Nonzero integral value if x > y, ​0​ otherwise.

### Notes

The built-in operator> for floating-point numbers may set FE_INVALID if one or both of the arguments is NaN. This function is a "quiet" version of operator>.

### Example

Run this code

    #include <math.h>
    #include <stdio.h>

    int main(void)
    {
        printf("isgreater(2.0,1.0)      = %d\n", isgreater(2.0, 1.0));
        printf("isgreater(1.0,2.0)      = %d\n", isgreater(1.0, 2.0));
        printf("isgreater(INFINITY,1.0) = %d\n", isgreater(INFINITY, 1.0));
        printf("isgreater(1.0,NAN)      = %d\n", isgreater(1.0, NAN));

        return 0;
    }

Possible output:

    isgreater(2.0,1.0)      = 1
    isgreater(1.0,2.0)      = 0
    isgreater(INFINITY,1.0) = 1
    isgreater(1.0,NAN)      = 0

### References

- C23 standard (ISO/IEC 9899:2024):

  - 7.12.14.1 The isgreater macro (p: TBD)

  - F.10.11 Comparison macros (p: TBD)

- C17 standard (ISO/IEC 9899:2018):

  - 7.12.14.1 The isgreater macro (p: 189)

  - F.10.11 Comparison macros (p: 386-387)

- C11 standard (ISO/IEC 9899:2011):

  - 7.12.14.1 The isgreater macro (p: 259)

  - F.10.11 Comparison macros (p: 531)

- C99 standard (ISO/IEC 9899:1999):

  - 7.12.14.1 The isgreater macro (p: 240)

### See also

isless (C99) | checks if the first floating-point argument is less than the second (function macro)
C++ documentation for isgreater

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